30: The ancient roots of the modern holy war by Tom Holland

The crusades, jihad, and wars in defence of intangible ideals all have their origins in a short-lived conflict in the 6th century BC. Read by Leighton Pugh.

Stone relief from the palace of Ashurbanipal, A detail from the battle of Til Tuba. Teumman the Elamite king is trying to escape but his chariot crashes. His horses panic, while he is trying to escape with an arrow in his back, supported by his son. Assyrian. Late Assyrian, c 645 BC. Nineveh, Assyria, Ancient Iraq. (Photo by Werner Forman/Universal Images Group/Getty Images)